Mississippi Gov. Haley Barbour is backing George LeMieux in a heated GOP primary for U.S. Senate.

Barbour, a former chairman of the Republican National Committee who briefly considered running in the 2012 presidential race, called LeMieux a “solid conservative” in a statement released this morning by LeMieux’s campaign.

“I am honored to earn the support of a principled conservative like Haley Barbour. When Governor Barbour was RNC Chairman, he helped orchestrate the Republican Revolution in 1994 that built the type of conservative majorities we need to turn our country around,” LeMieux said in the release. “More importantly, from his leadership during hurricane Katrina to his work passing key pro-life legislation, Governor Barbour is a case study in effective conservative governance.”

LeMieux is struggling to shake off his ties to Gov. Charlie Crist, who appointed LeMieux to replace former U.S. Sen. Mel Martinez when he resigned mid-term. LeMieux, a one-time close ally to Crist whom the former governor called “The Maestro,” did not seek reelection to the seat, which now-U.S. Sen. Marco Rubio won after Crist quit the GOP and ran against him as an independent.

LeMieux will face off in the primary against Delray Beach’s Adam Hasner, a former state House member who also served as the chamber’s majority leader.

Wealthy Delray Beacher Nick Loeb is toying with entrée into the race but is waiting until gal pal Sofia Vergara, star of Modern Family, gets past the Emmy Awards next month. Chris Ruddy, another Palm Beacher and CEO of the influential West Palm Beach-based conservative publication NewsMax, has ruled out getting into the candidate fray.

A Quinnipiac University poll last week showed that 53 percent of Republican voters remain undecided in the Senate primary but found Plant City tree farmer and retired Army Reserve Col. Mike McCalister leading the current four-candidate field with a meager 15 percent.

Behind McCalister in the poll were both LeMieux, with 12 percent, and Hasner, with 6 percent. Former Ruth’s Chris Steakhouse CEO Craig Miller weighed in with 8 percent support.